Synthetic paper master batches with PP as carrier and preparation method thereof

Abstract

The invention relates to the field of synthetic paper processing, and specially relates to synthetic paper master batches with PP as a carrier and a preparation method thereof. The master batches arecomposed of, by weight, the following components: 65-75 parts of calcium carbonate powder, 20-28 parts of polypropylene, 0.1-0.5 part of an antioxidant, 0.2-0.5 part of a lubricant, and 3-8 parts of acolouring agent. The master batches, which are suitable for production of synthetic paper with the PP as the carrier, are prepared by a mixing granulation process with a rate of high temperature andhigh shear; a production process of the master batches is simple; the dispersibility of a filler is good; and the produced synthetic paper has the advantages of good properties of tension resistance and tear resistance, multiple-folding resistance, a low friction coefficient, and the like, and is suitable for usage of raw materials for packaging paper, printing paper, archival paper and writing paper.

Description

technical field [0001] The invention relates to the field of synthetic paper processing, in particular to a PP carrier synthetic paper masterbatch and a preparation method thereof. Background technique [0002] Synthetic paper is a wood-free environmentally friendly paper made by using inorganic mineral powder, resin, and processing aids through stirring, melting, and co-extrusion. Therefore, it is not necessary to cut down trees and use a lot of water to prepare wood pulp. Wood pulp, thus reducing the disadvantages of deforestation and water pollution. [0003] In the current synthetic paper, polypropylene (PP) is used as a carrier and inorganic mineral powder is added as a single-layer or multi-layer synthetic paper produced as a filler. Due to the high viscosity of polypropylene, it is easy to appear during the one-time extrusion process of synthetic paper. The following defects: [0004] (1) Due to the fact that raw materials such as inorganic mineral powder are diffic...

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Problems solved by technology

[0004] (1) Due to the fact that raw materials such as inorganic mineral powder are difficult to disperse evenly in the highly viscous polypropylene, resulting in surface powder removal and partial agglomeration, resulting in poor smoothness and low physical and mechanical properties of the final synthetic paper;

[0005] (2) Adopt the method of reducing the content of inorganic mineral powder, and use polypropylene supplemented with other resins to make synthetic resin as the carrier. To a certain extent, it is easy to have silver streaks due to different resin components, resulting in the flexibility of the overall paper degree, resulting in poor foldability and weak tear resistance;

[0006] (3) Improve the dispersibility of inorganic mineral powder by adding a coupling agent to avoid the disadvantages of poor physical and mechanical properties of synthetic paper such as folding resistance and tear resistance due to multiple resin types, but most of them are suitable for adding to non-polar Most of the coupling agents of calcium-plastic system, such as titanate and silane coupling agents, are liquid, which is inconvenient to add and expensive

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